JPS591129B2 - Cold rolled steel plate cleaning equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a cleaning device for preventing the occurrence of smudges on the surface of a steel sheet in the manufacturing process of cold-rolled steel sheets, in which an electrolysis cleaning line is omitted.

In the cold rolling process, rolling oil is used for lubrication and cooling, but the rolling oil adhering to the steel plate decomposes in the highly strained atmosphere of the annealing process and remains as carbide (smudge). do. This smudge needs to be removed because it worsens the appearance of the product and the adhesion of the plating (V). Generally, before the annealing process, the steel plate surface is rolled through a cleaning line using brushing using an alkaline cleaning solution and electrolysis. I'm trying to remove the oil. However, since the cleaning process is relatively expensive, the surface quality is very strict in the normal cold rolling process (only required items are passed through the cleaning line, and other items are passed through the cleaning line and sent to the annealing line). I had a method of direct shipping.

Therefore, steel plates that are directly delivered are accompanied by the occurrence of smudges, leaving problems in terms of surface quality. SUMMARY OF THE INVENTION An object of the present invention is to provide an apparatus for effectively preventing the occurrence of smudges on steel plates, which eliminates the need for a cleaning line, and to address the conventional problems in surface quality.

The main purpose of the present invention is to spray a cleaning liquid (alkaline cleaning liquid, hot water, etc., simply referred to as a cleaning liquid) onto the surface of a steel plate after cold rolling to clean the surface, and then remove these liquids from the steel plate surface to remove the electricity. The purpose is to perform cleaning similar to that of the decontamination line, and the feature is that the jet nozzle is angled at a special angle in order to perform particularly effective cleaning.

The injection nozzles in the device of the invention are typically about 9 in 100
/Cd and a flow rate of about 1000 e/min (one side contact υ). Or they are provided in a similar form on the entry and exit sides.

The nozzle header 1 has a length sufficient to accommodate the width direction of the steel plate s, but as shown in FIGS. It is now possible to adjust the rotation, and normally the rotation is not perpendicular to the width direction of the board, but rather at a certain angle α (30 to 45
It is designed to be fixed while maintaining the desired temperature.
Therefore, the fitting part 11 of the header 1 is rotatable with respect to the support arm 2, which also serves as a cleaning liquid supply path. It is also watertightly connected. After setting the angle, it is fixed with a screw 21 or the like. In header 1. Of course, a nozzle will be provided. Regarding the nozzle of the present invention. It does not have many pipe nozzles that emit spot-like jets. A long continuous slit-shaped nozzle 12 is provided along the header 1. This allows the liquid to be sprayed intermittently in a wide waterfall pattern.

Also. The nozzle 12 is. As shown in Figure 5. They may be provided at two locations along the circumferential direction of the header 1. In either case, the injection can be performed while maintaining a constant angle β (preferably 15 to 45 plates) with respect to the flow direction of the steel plate s. The injection angle was set to 15 to 45 degrees. 15 degrees? If the angle is below 45 degrees, the effect of washing the dirt on the steel plate with the water flow is small, and if it is above the 45-degree angle, the impinging flow pressure of the water stream on the surface of the steel plate to remove the dirt from the steel plate becomes small, which is not preferable. Therefore. Spray angle 15-45
It was a degree. Six partition plates 13 are disposed at both ends of the nozzle header 1 in a watertight loose fit to prevent leakage of the ejected liquid. Partition plate 13
teeth. As shown in FIG. 4, the nozzle including the nozzle 12
It is shaped to engage in the cross-sectional direction of the entire header 1. Furthermore, the position can be adjusted by slidingly moving within the header 1 by operating the adjustment handle 14. Therefore. The injection width can be set according to the width of the steel plate s. Instead of the partition plate 13, a cover is slidably engaged with the outer periphery of the end of the header 1. The spray width of the nozzle 12 may be adjusted.

The turning angle α of the nozzle header 1 in the device of the present invention can be arbitrarily adjusted depending on the line bead and the degree of contamination of the steel plate. Usually around 45% is appropriateV). Also. The angle β provided on the nozzle 12 is 15 to 45V
is appropriate.

If you die from this device. By spray a that is injected against the direction of conveyance of the steel plate s. First, let the dirt float to the surface. It is cleaned by spray b sprayed along the transport direction.

At this time, the injection liquid is not sprayed onto the steel plate in a spot, but is sprayed in an unbroken band across the entire width of the steel plate. moreover. The width of the jet is adjusted by the partition plate 13 according to the width of the steel plate. According to the invention. The cleaning effect is significantly enhanced by the effect of the nozzle arrangement. Regarding steel plates that omit the cleaning process. It can sufficiently prevent the occurrence of smut. Vc. Conventional. This makes it possible to omit the cleaning line even for types of steel plates that cannot be omitted. It has become possible to lower the conventional cleanliness ratio of 50(f) to the amount of cold pressure to about 30%.

Also. The sprayed cleaning liquid automatically flows out of the cleaning surface due to the effect of the nozzle arrangement. It is not necessary to provide a squeezing roll, and therefore it is extremely effective as an injection means installed in a narrow area.

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram showing the arrangement of injection nozzles according to the present invention. FIG. 2 is a top view of the nozzle of the present invention. FIG. 3 is a partially sectional front view of the nozzle of the present invention. FIG. 4 is a sectional view taken along the - line in FIG. 3. FIG. 5 is a sectional view taken along line V-V in FIG. 3. 1: Nozzle header. 12: Nozzle. 13
: Partition board. 2: Support arm. s: Steel plate. c: Cold rolling tandem mill.

Claims (1)

[Scope of Claims] 1. In a cold-rolled steel plate cleaning device that is installed on the entry side or exit side of the final stand of a cold rolling mill and has a function of spraying a high-pressure cleaning liquid onto the front and back surfaces of the steel plate, A nozzle header that is suspended from a support arm in a corresponding manner and whose angle can be freely adjusted in a horizontal rotation direction about the support part, a slit-shaped nozzle provided along the longitudinal direction of the nozzle header, and a nozzle header. 1. A cleaning device for cold-rolled steel sheets, comprising partition walls that are loosely fitted to both ends of the partition wall and are provided so as to be able to adjust the jet width of the jet liquid. 2. The device according to claim 1, wherein two nozzles are provided in the circumferential direction of the nozzle header so that the cleaning liquid is sprayed at an angle of 15 to 45 degrees with respect to the steel plate.